Knife grinding attachment



July 2, 1935.

.S. OXENHANDLER KNIFE GRINDING ATTACHMENT Filed Sept. '7, 1954 2 Sheets-Sheet 1 Attd'mey July 2, 1935. 5 OXEN-HANDLER I 2,006,510

KNIFE GRINDING ATTACHMENT Filed Sept. '7, 1954 2 Sheets-Sheet 2 Inventor q 0 y v Attorney Patented July 2, 1935 UNITED STATES rrENT OFFICE Sol Oxenhandler, St. Louis, Mo.

Application September '7, 1934, Serial No. 743,129

1 Claim.

The present invention relates to new and useful improvements in knife grinders or Sharpeners, and has for its primary object to provide, in a manner as hereinafter set forth, a device of this 5 character which may be expeditiously connected to the drive shaft of a conventional motor driven meat grinder for actuation thereby.

Other objects of the invention are to provide a knife grinding attachment of the aforementioned character which will be comparatively simple in construction, strong, durable, highly emcient and reliable in use, compact, light in weight and. which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of the invention will becomes apparent from a study of the following specification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the several views, and wherein:

Figure 1 is a View in front elevation of a knife grinding attachment constructed in accordance with the present invention. I

Figure 2 is a view looking at the rear or inner end of the invention.

Figure 3 is a vertical longitudinal sectional view, showing the invention connected toa meat grinder.

Figure 4 is a View in vertical transverse section, taken substantially on the line 44 of Figure 3.

Figure 5 is a detail view of the grinding wheel retaining element, showing same broken away in section.

Referring now to the drawings in detail, it will be seen that the reference numeral l designates a portion of the housing of a conventional meat grinder having formed integrally therewith a horizontally extending socket 2 for the reception of the worm housing, etc. Of course, the worm, worm housing, etc. of the grinder are removed when the device constituting the present invention is to be used. The reference numeral 3 designates the drive shaft of the meat grinder. The embodiment of the present invention which has been illustrated comprises a housing which is designated generally by the reference numeral 4, said housing including an annulus 5 to which opposed end walls 6 and I are removably secured, as by screws 8.

Formed integrally with the end wall 1 of the housing i, on the outer side thereof, is a bearing 9 which is engageable in the socket 2. As best seen in Figure 3 of the drawings, the bearing 9 has formed therein a socket for the reception of the securing screw [0.

Journaled in the bearing 9 and extending through the housing 4 is a shaft I! having fixed thereon, within said housing, a comparatively large gear l2. The forward end portion of the shaft H is reduced, as at l3, and journaled in a suitable bearing provided therefor in the end wall 6. The other end portion M of the shaft H projects beyond the free end of the bearing 9 for engagement in the usual polygonal socket in the shaft 3 of the meat grinder. Of course, the end portion it of the shaft ll isalso polygonal in cross section to conform to the socket in the shaft 3 and for providing a driving connection.

Also journaled in the housing 4 is a shaft 15 having fixed thereon, within said housing, a comparatively small gear it which is in mesh with the gear E2. The rear end portion of the shaft I5 is reduced, as at H, and journaled in the end wall 1. The shaft l5 extends forwardly from the housing 4 and has threadedly mounted thereon an adjustable nut 8 with which a grinding wheel I9 is engageable. The grinding wheel 59 is se-. cured on the shaft l5 in abutting engagement with the nut 88 through the medium'of a threadless nut 29 which is provided with a spring actuated detent or pin 2| (see Figure 5) which is engageable in a socket which is provided therefor in the shaft l5. Any suitable means may be provided, if necessary, for preventing rotation of the grinding wheel 99 relative to the shaft Hi.

It is thought that the manner of using the invention will be readily apparent from a consideration of the foregoing. As hereinbefore stated, when the knife grinder constituting the present invention is to be used, the housing, worm, etc.

are removed from the meat grinder and the in vention is substituted therefor, the bearing 9 being engaged in the socket 2 and firmly secured by the screw H3. Then, when the shaft 3 of the meat grinder is actuated, the shaft H is driven thereby which, in turn, drives the shaft 55 through the gears l2 and It for rotating the knife grinding or sharpening wheel It. It has been found that the invention is particularly desirable in meat dispensing establishments as it provides, at a reasonable cost, means for conveniently sharpening butcher knives and other implements. The reference numeral 22 designates a pin on the end wall 1 of the housing t which is engageable with the meat grinder to assist in securing the invention in place. The adjustable nut I8 permits grinding wheels of different thicknesses to be mounted on the shaft l5.

It is believed that the many advantages of a knife grinding attachment for meat grinders constructed in accordance with the present invention will be readily understood, and although a preferred embodiment of the invention is as illustrated and described, it is to be understood that changes in the details of construction and in the combination and arrangement of parts may be resorted to which will fall within the scope of the invention as claimed.

What is claimed is:

A knife grinder comprising a housing, a drive shaft and a driven shaft journaled in the housing and projecting in opposite directions therefrom, means connecting the driven shaft to said drive shaft for actuation thereby, a grinding Wheel removably mounted on the driven shaft, a removable retaining nut slidably mounted on said driven shaft and engaged with the outer face of the grinding wheel, a spring actuated pin slidably mounted in the nut and engaged with the driven shaft for securing said nut thereon, and a nut threadedly mounted on the driven shaft and engaged with the inner face of the grinding wheel and cooperable with the firstnamed nut for securing the grinding wheel in position on the driven shaft.

SOL OXENHANDLER. 

